At the risk of again being accused of quote mining

, here's one that I think is worth considering:
"Looking back through the prodigious vista of the past, I find no record of the commencement of life and therefore I am devoid of any means of forming a definite conclusion as to the conditions of its appearance. Belief, in the scientific sense of the word, is a serious matter, and needs strong foundations. To say, therefore, in the admitted absence of evidence, that I have any belief as to the mode in which the existing forms of life have originated, would be using words in a wrong sense... I beg you once more to recollect that I have no right to call my opinion anything but an act of philosophical faith." {Charles Darwin, Discourses Biological and Geographical, pgs. 257, 258}
I don't know if it's true, but I once heard that the only degree Darwin possessed was in theology.